package com.foreknow.controller;


import com.foreknow.bean.Guestbook;
import com.foreknow.service.GuestbookService;
import com.foreknow.service.impl.GuestbookServiceImpl;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;

public class ManageServlet extends HttpServlet {

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        //我们只需 要在doGet中获取到请求的参数q=list，然后根据获取到的参数来决定调用哪一个方法
        String method = req.getParameter("q");
        if("delete".equals(method)) {
            delete(req,resp);
        }else if("update".equals(method)){
            update(req,resp);
        }else {
            list(req,resp);
        }
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doGet(req,resp);
    }

    //查询所有信息的方法
    protected void list(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        resp.setContentType("text/html;charset=utf-8");
        PrintWriter out =resp.getWriter();
        //调用业务层查询方法
        GuestbookService service = (GuestbookService) new GuestbookServiceImpl();
        List<Object> list = service.queryInfo();
        Guestbook gb= (Guestbook) list.get(0);
        out.println(gb.getName());
    }

    //删除
    protected void delete(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
    }

    //修改
    protected void update(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

    }

}

